JPS6345462U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の実施例のボールバルブの断面
図である。 １：本体、３：端部材、４：入口、５：出口、
６：弁室、７：弁ボール、８：貫通孔、１１，１
２：環状弁座、１５，１６，１７，１８：形状記
憶合金、２０：弁軸。 FIG. 1 is a sectional view of a ball valve according to an embodiment of the present invention. 1: Main body, 3: End member, 4: Inlet, 5: Outlet,
6: Valve chamber, 7: Valve ball, 8: Through hole, 11, 1
2: Annular valve seat, 15, 16, 17, 18: Shape memory alloy, 20: Valve stem.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 流体通路を形成する弁ケーシング内に、貫通孔
を有する弁ボールを配置し、弁ケーシングを気密
的に貫通した弁軸で弁ボールを回転操作し、弁ボ
ールに当接して流体通路の開閉作用を弁ボールと
共に協働する合成樹脂や合成ゴムで作つた環状弁
座を流体通路内に配置したもの於いて、環状弁座
の内周あるいは側面に環状溝を形成し、環状溝に
バイメタルや形状記憶合金等の温度応動部材を配
置し、温度応動部材が環状弁座の外周を弁ケーシ
ングの壁面に対して低温時に強く高温時に弱く付
勢するようにしたボールバルブ。 A valve ball having a through hole is placed in a valve casing that forms a fluid passage, and a valve shaft that passes through the valve casing in an airtight manner rotates the valve ball, making contact with the valve ball to open and close the fluid passage. In cases where an annular valve seat made of synthetic resin or synthetic rubber that works together with a valve ball is placed in the fluid passage, an annular groove is formed on the inner circumference or side surface of the annular valve seat, and a bimetal or shape memory material is formed in the annular groove. A ball valve in which a temperature-responsive member such as an alloy is arranged so that the temperature-responsive member biases the outer periphery of the annular valve seat against the wall of the valve casing, strongly at low temperatures and weakly at high temperatures.